Melt spinning of poly(acrylonitrile)-co-styrene copolymer

Fleming, Robson; Candido, Thierry O.; Granado, Nilton P.; Pardini, Luiz Carlos

doi:10.1016/j.polymdegradstab.2021.109702

Cited by 6 publications

(3 citation statements)

References 32 publications

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“…An increase in the thermal stability of PAN-based fibers was achieved by using styrene as a comonomer [ 88 ]. The copolymer obtained by suspension polymerization was characterized by M n = 46 kg⋅mol −1 and Đ = 3.0, but its composition was not disclosed.…”

Section: Chemical Approach To Reduction Of Melting Point: Selection O...mentioning

confidence: 99%

“…Another version is based on the difference in the thermal behavior of the polymer in an inert and air atmosphere, as is the case of the copolymer of AN and 1-vinylimidazole [ 88 , 89 , 90 , 91 ]. At a certain composition and MW of the copolymer, the cyclization of the copolymer occurs at a temperature above the melting point, while TOS occurs below the melting point.…”

Section: How To Conduct Stabilization Of the Fiber Without Its Meltin...mentioning

confidence: 99%

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Melt-Spinnable Polyacrylonitrile—An Alternative Carbon Fiber Precursor

et al. 2022

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The review summarizes recent advances in the production of carbon fiber precursors based on melt-spun acrylonitrile copolymers. Approaches to decrease the melting point of polyacrylonitrile and acrylonitrile copolymers are analyzed, including copolymerization with inert comonomers, plasticization by various solvents and additives, among them the eco-friendly ways to use the carbon dioxide and ionic liquids. The methods for preliminary modification of precursors that provides the thermal oxidative stabilization of the fibers without their melting and the reduction in the stabilization duration without the loss of the mechanical characteristics of the fibers are discussed. Special attention is paid to different ways of crosslinking by irradiation with different sources. Examples of the carbon fibers preparation from melt-processable acrylonitrile copolymers are considered in detail. A patent search was carried out and the information on the methods for producing carbon fibers from precursors based on melt-spun acrylonitrile copolymers are summarized.

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Section: Chemical Approach To Reduction Of Melting Point: Selection O...mentioning

confidence: 99%

Section: How To Conduct Stabilization Of the Fiber Without Its Meltin...mentioning

confidence: 99%

Melt-Spinnable Polyacrylonitrile—An Alternative Carbon Fiber Precursor

et al. 2022

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“…This process is associated with increased processing time and production cost. [ 6,7 ] One of the disadvantages of the PAN‐based CFs is the high cost, a factor that limits the use of CFs in other market segments, such as the automotive industry. PAN precursor costs represent just over 50% of PAN‐based CF costs.…”

Section: Introductionmentioning

confidence: 99%

Processing and characterization of carbon nanofibers obtained from PAN/lignin blends processed by electrospinning

Cintra

Baldan

Anjos

et al. 2023

Polymer Engineering & Sci

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Blankets based on blends with different PAN/lignin ratios (10 and 50% wt. of lignin) were processed via electrospinning. Then, the blankets obtained were thermally treated in order to produce samples of carbon nanofibers. The thermo‐oxidative stabilization parameters were defined based on a 23‐factorial design. The samples, after stabilization, were analyzed by differential scanning calorimetry (DSC), thermogravimetry (TGA), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FT‐IR) techniques. Based on the results, the best parameters for the stabilization of electrospun, blankets were selected, and subsequently, the most adequate carbonization parameters were established to obtain the carbon blankets. The carbonized blankets were characterized for electrical conductivity by impedance spectroscopy, chemical structure (Raman and FT‐IR spectroscopies), crystallographic ordering by X‐ray diffraction (XRD), and morphology (SEM). The results showed the feasibility of producing carbon blankets based on PAN/lignin blends. However, carbonized blankets showed low carbon yield (10–56%) and a decrease of up to 70% in fiber diameter. XRD and Raman spectroscopy showed that the structural ordering of carbon blankets presents different values according to the heat treatment parameters used (45–57%) and a poorly ordered structure, indicated by the ID/IG ratio.

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